diff options
Diffstat (limited to 'include/device_proto.h')
| -rw-r--r-- | include/device_proto.h | 13 |
1 files changed, 9 insertions, 4 deletions
diff --git a/include/device_proto.h b/include/device_proto.h index 037451a..6bcbcb0 100644 --- a/include/device_proto.h +++ b/include/device_proto.h @@ -92,22 +92,29 @@ namespace nitrokey { */ template<CommandID cmd_id, typename ResponsePayload> struct DeviceResponse { + static constexpr auto storage_status_absolute_address = 21; //magic number from firmware + static constexpr auto header_size = 8; //from _zero to last_command_status inclusive + static constexpr auto footer_size = 4; //crc + static constexpr auto boiler_size = header_size + footer_size; + uint8_t _zero; uint8_t device_status; uint8_t command_id; // originally last_command_type uint32_t last_command_crc; uint8_t last_command_status; + union { - uint8_t _padding[HID_REPORT_SIZE - 12]; + uint8_t _padding[HID_REPORT_SIZE - boiler_size]; ResponsePayload payload; struct { - uint8_t _storage_status_padding[20 - 8 + 1]; //starts on 20th byte minus already 8 used + zero byte + uint8_t _storage_status_padding[storage_status_absolute_address - header_size]; uint8_t command_counter; uint8_t command_id; uint8_t device_status; //@see stick20::device_status uint8_t progress_bar_value; } __packed storage_status; } __packed; + uint32_t crc; void initialize() { bzero(this, sizeof *this); } @@ -120,9 +127,7 @@ namespace nitrokey { } void update_CRC() { crc = calculate_CRC(); } - bool isCRCcorrect() const { return crc == calculate_CRC(); } - bool isValid() const { // return !_zero && payload.isValid() && isCRCcorrect() && // command_id == (uint8_t)(cmd_id); |